posted by mehari .
A rock is thrown vertically upward from the ground with an initial speed 15m/s.
a. how high does go?
b. how much time is required for the rock to reach its maximum height?
c. what is the rock's height at t=2.00s?
At the top, final veloctiy is zero.
Vf=Vi-g*t to get time
h= Vi*t-1/2 g t^2 to get height.